EP3125642B1 - Data transport method and data transmission apparatus - Google Patents

Data transport method and data transmission apparatus Download PDF

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Publication number
EP3125642B1
EP3125642B1 EP14888405.9A EP14888405A EP3125642B1 EP 3125642 B1 EP3125642 B1 EP 3125642B1 EP 14888405 A EP14888405 A EP 14888405A EP 3125642 B1 EP3125642 B1 EP 3125642B1
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EP
European Patent Office
Prior art keywords
data
transmission
transmitting
transmitting method
new transmission
Prior art date
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EP14888405.9A
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German (de)
English (en)
French (fr)
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EP3125642A4 (en
EP3125642A1 (en
Inventor
Masaaki Kusano
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Publication of EP3125642A4 publication Critical patent/EP3125642A4/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H04L1/1816—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of the same, encoded, message
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H04L1/1819—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1822—Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/189—Transmission or retransmission of more than one copy of a message
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/24—Testing correct operation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections

Definitions

  • the present invention relates to a data transmitting method, a data receiving apparatus, a data transmitting apparatus, a base station, a mobile station, a data transmitting/receiving apparatus, and a mobile communication system.
  • error correction by HARQ Hybrid ARQ
  • the error correction by the HARQ has been applied to not only data transmission of bidirectional communication between a base station and a mobile station but also data transmission of unidirectional communication for notification information or the like.
  • a delivery confirmation is absent concerning the data transmission of the unidirectional communication. Therefore, the same data or an error correction code generated from the same data is continuously transmitted, that is, consecutively transmitted, and soft decision combination is performed to perform error correction on a data receiving side.
  • Non-Patent Literature 1 discloses non-communication monitoring performed using " ue-InactiveTime" (see P306 to 307 ).
  • Non-Patent Literature 1 3GPP TS36.331 V12.0.0 (2013-12 )
  • connection to a mobile station outside the zone or a mobile station having no data to be transmitted is actively disconnected. It is possible to statistically increase the number of mobile stations present in the zone in a wide range around the base station. However, the mobile station has to be connected again when data to be transmitted is generated in the mobile station. Therefore, there is a problem in that a connection delay occurs.
  • road-to-vehicle communication or vehicle-to-vehicle communication which is mobile communication applied to a train or automobile traffic system
  • brake control information which is an example of control information for controlling the mobile station on a real time basis
  • the number of mobile stations actually present in the zone cannot be grasped and it is attempted to connect the mobile station again, it is likely that a maximum number of mobile stations to be accommodated is exceeded. Therefore, there is a problem in that control of the mobile station is disabled.
  • the present invention has been devised in view of the above and an object of the present invention is to obtain a data transmitting method that can prevent, without causing a connection delay, control of a mobile station from being disabled.
  • the present invention provides a data transmitting method applied with HARQ for transmitting data from a data transmission side to a data reception side.
  • the data transmission side allocates a process, which is a transmission unit of same data, to new transmission data and transmits the new transmission data, cyclically continues to transmit the same data of the new transmission data or an error correction code of the same data in a process same as the process until generation of another new transmission data, and allocates, when another new transmission data is generated, the process of the cyclically continued transmission to the other new transmission data and cyclically transmits the other new transmission data.
  • the data reception side performs data combination by the HARQ using the received data to normally receive data and detect a data error or data non-reception and monitors a communication connection state with the data transmission side using the received data.
  • FIG. 1 is a diagram showing a data transmitting method by a basic operation of HARQ.
  • the HARQ is a data transmitting method widely used in a cellular mobile communication system and mainly applied to unicast transmission to a specific destination at the time when high-rate data transmission is performed.
  • a base station 1 receives data from a mobile station 2, inspects the received data with CRC (Cyclic Redundancy Check), and transmits ACK or NACK, which is a delivery confirmation, to the mobile station 2.
  • CRC Cyclic Redundancy Check
  • NACK NACK
  • the mobile station 2 allocates the data to different HARQ processes and sequentially transmits the data for each of time slots subjected to time division.
  • the HARQ process is hereinafter simply referred to as "process”.
  • the base station 1 performs management of the time slots, which are radio resources. The base station 1 allocates the time slots in advance before the mobile station 2 transmits the data.
  • the base station 1 When the data is transmitted using processes #0, #1, and #2 and, for example, an error occurs in the data 4a of the process #1 as shown in FIG. 1 , the base station 1 transmits a NACK response 7a, which is a delivery confirmation of the process #1. Note that the error includes non-reception. Because the data 3a and 5a of the processes #0 and #2 are normally received by the base station 1, the base station 1 transmits ACK responses 6a and 8a, which are delivery confirmations of the processes #0 and #2. Note that, in an example explained here, when an error occurs in data received by the base station 1, the base station 1 transmits a NACK response. However, the present invention is not limited to this. The mobile station 2 can determine that a response of a process in which an ACK response is not received is a NACK response.
  • the mobile station 2 When receiving the NACK response 7a of the process #1, the mobile station 2 retransmits the data of the process #1 or transmits an error correction code and combines the error correction code with the data 4a including the error received by the base station 1 before. Then, the data of the process #1 is normally received. In FIG. 1 , retransmission data 4b is shown. In the data transmitting method for performing the retransmission after receiving the NACK response in this way, there is a problem in that a feedback delay occurs because the mobile station 2 waits for the NACK response and a large delay occurs before the base station 1 normally receives the data through the retransmission.
  • a process number for identifying a process is transmitted as control information together with data to be transmitted or is determined in association with a time slot for transmitting the data.
  • a sequence number indicating whether, even in the same process, data is different or data is the same is transmitted as control information together with data transmission.
  • a reception side determines according to a combination of the process number and the sequence number of the data whether the received data is to be combined. Such a determination method for data combination is an operation generally performed in the HARQ. Therefore, although the same method is used in a data transmitting method explained blow, explanation of the method is omitted.
  • FIG. 2 is a diagram showing a data transmitting method by an operation for consecutively transmitting data.
  • the data transmitting method shown in FIG. 2 is applicable to unicast, broadcast, or multicast.
  • the mobile station 2 transmits data and the base station 1 transmits a delivery confirmation.
  • the base station 1 transmits a delivery confirmation. For simplification, data transmission in the process #1 is explained.
  • the base station 1 when an error occurs in data 9a when the mobile station 2 transmits the data 9a in the process #1, the base station 1 transmits a NACK response 10a.
  • the mobile station 2 consecutively transmits the data of the process #1 or consecutive transmission data 9b, which is an error correction code, before receiving the NAC response 10a. Therefore, the base station 1 can combine the data 9a of the process #1 and the error correction code and can normally receive data in time shorter than a feedback delay.
  • the number of times of consecutive transmission within the feedback delay is once. However, the number of times of consecutive transmission within the feedback delay is not limited to this and can be a plurality of times.
  • the mobile station 2 cyclically continues the consecutive transmission until receiving an ACK response 10b concerning the process #1 and consecutively transmits the data of the process #1 or consecutive transmission data 9c, which is an error correction code. However, when the ACK response 10b is received or the number of times of transmission reaches a maximum number of times of the consecutive transmission set in advance, the mobile station 2 stops the consecutive transmission in the process. Note that the ACK response 10c is a delivery confirmation for the consecutive transmission data 9c.
  • the mobile station 2 does not perform data transmission in the process #1 before the process #1 is allocated according to generation of new data. According to the data transmitting method for performing the consecutive transmission shown in FIG. 2 , it is possible to use a combination function of the HARQ without a feedback delay. Therefore, the data transmitting method shown in FIG. 2 is suitable for data transmission in which a low rate and a real time property are required.
  • FIG. 3 is a diagram showing an embodiment of a data transmitting method according to the present invention.
  • the data transmitting method shown in FIG. 3 is a data transmitting method in which data consecutive transmission and health check are associated.
  • the mobile station 2 transmits data and the base station 1 transmits a delivery confirmation.
  • Data transmission of the process #1 is explained.
  • Concerning the number of processes to be simultaneously used a plurality of processes can be used according to a new data generation frequency.
  • a maximum number of usable processes is determined as quality of service (QoS) of a logical channel that performs communication during connection or during addition of communication. That is, a maximum number of processes simultaneously usable for one logical channel is limited.
  • the maximum number of processes is set larger for a logical channel in which the new data generation frequency is higher.
  • QoS quality of service
  • the base station 1 transmits a NACK response 12a.
  • the mobile station 2 consecutively transmits data of the process #1 or consecutive transmission data 11b, which is an error correction code, before receiving the NACK response 12a. Therefore, as in FIG. 2 , the base station 1 can normally receive data in time shorter than a feedback delay. Note that, in FIG. 3 , as in FIG. 2 , the number of times of the consecutive transmission within the feedback delay can be a plurality of times.
  • ACK responses 12c and 12d are respectively delivery confirmations of consecutive transmission data 11c and 11d.
  • a delivery confirmation of consecutive transmission data 11e is omitted in the figure.
  • An ACK response 12x is a last delivery confirmation concerning consecutive transmission data of the data 11a.
  • new data 13a and 13b are transmitted in the same process number, the new data 13a and 13b are transmitted with sequence numbers changed. Thereafter, similarly, the consecutive transmission is continued until the next new data allocated to the process #1 is generated. Therefore, even when a generation interval of new data in the mobile station 2 is not fixed, the base station 1 can cyclically and continuously receive data from the mobile station 2.
  • an ACK response 14a is a delivery confirmation of the data 13a.
  • Fluctuation occurs in the number of times of consecutive transmission according to a generation interval of data.
  • the number of times of transmission of the same data including initial transmission is retained as a parameter "minimum number of times of transmission".
  • the same data can be an error correction code.
  • the minimum number of times of transmission is a parameter that is set in advance and can be changed during communication. When the minimum number of times of transmission is "1", radio transmission is performed at least once for generation of one new data. When the minimum number of times of transmission is "0", when new data is continuously generated in shorter time than a consecutive transmission interval, the new data generated earlier is discarded without being transmitted by radio and the new data generated immediately after the new data is transmitted by radio.
  • the base station 1 can receive consecutive transmission data even when a delivery confirmation is erroneously determined, that is, a NACK response is erroneously determined as an ACK response. Therefore, it is possible to perform high-quality data transmission.
  • the mobile station 2 performs the consecutive transmission before receiving a delivery confirmation.
  • the present invention is not limited to this.
  • the mobile station 2 can perform the consecutive transmission after receiving the delivery confirmation.
  • the base station 1 which receives the data, transmits the delivery confirmation.
  • the data transmitting method can be simplified not to transmit the delivery confirmation.
  • the base station 1 performs health check of the mobile station 2 using high-quality and cyclically received data.
  • the health check is a function for monitoring an in-zone state of the mobile station 2 and maintaining a communication connection state.
  • the base station 1 When receiving consecutive transmission data within a fixed period, the base station 1 maintains the communication connection state with the mobile station 2. Conversely, when a state in which data cannot be received from the mobile station 2 continues for the fixed period or more, the base station 1 determines that the mobile station 2 has shifted to the outside of the zone of the base station 1 or the mobile station 2 has fallen into a situation in which the mobile station 2 cannot perform communication. The base station 1 disconnects the communication connection state with the mobile station 2. Control for disconnecting the communication connection state can be performed by a host apparatus connected to the base station 1. When the control for disconnecting the communication connection state is performed by the host apparatus of the base station 1, the base station 1 notifies the host apparatus that communication with the mobile station 2 cannot be performed and waits for a communication disconnection instruction from the host apparatus.
  • the health check is performed using the high-quality data transmission, it is possible to perform highly reliable maintenance and management of a communication connection state. Because transmission reliability of data used for the health check is higher as the number of processes to be simultaneously used is larger, a maximum number of processes simultaneously used for data transmission is not determined according to only the new data generation frequency as explained above and is increased according to requested reliability of communication connection maintenance. Note that the maximum number of usable processes is determined as QoS during connection or during addition of communication.
  • FIG. 4 is a diagram showing a data transmitting method applied when there are a plurality of kinds of QoS of data to be transmitted.
  • connection-type communication in general, the mobile station 2 is capable of simultaneously performing a plurality of kinds of communication.
  • QoS is determined for each of logical channels equivalent to a communication unit.
  • Information indicating to which QoS the logical channels belong is determined during connection or during addition of communication.
  • Data transmission associated with the QoS is performed for each of the logical channels.
  • QoS is given for each of data.
  • the connection-type communication similarly, QoS is uniquely determined for data belonging to one logical channel. Therefore, the logical channels are used in the following explanation.
  • FIG. 4 for simplification, a data transmitting method applied when data of two kinds of QoS are mixed is shown.
  • a data transmitting method applied when data of two kinds of QoS are mixed is shown.
  • kinds of QoS corresponding to the logical channels are stored in a QoS setting table 17.
  • FIG. 5 is a diagram showing an example of the QoS setting table.
  • one transmitting method is uniquely determined in advance for one kind of QoS.
  • Data transmitting methods for the logical channels are uniquely determined by referring to the QoS setting table 17.
  • a data transmitting method #3 which is the data transmitting method in this embodiment shown in FIG. 3
  • retransmission which is a data transmitting method #1
  • a data transmitting method #2 which is the data transmitting method shown in FIG. 2 , can be applied.
  • a MAC scheduler 16 allocates processes to data transmitted in the logical channels and transmits the data to time-division time slots.
  • the MAC scheduler 16 determines referring to the QoS setting table 17 that the new data is transmitted by the data transmitting method #3.
  • the data transmitting method #3 a process in use, in which the consecutive transmission is continued as shown in FIG. 3 , is updated and used. Therefore, a process in used in the logical channel #0 is checked in a process correspondence table 18.
  • FIG. 6 is a diagram showing an example of the process correspondence table.
  • the process #1 is allocated in FIG. 4 .
  • a process number corresponding to the logical channel #0 is stored in the process correspondence table 18.
  • Use of the process #1 for the data transmitting method #3 is stored in the process state table 19.
  • FIG. 7 is a diagram showing an example of the process state table.
  • the MAC scheduler 16 consecutively transmits data of the logical channel #0 in the data transmitting method #3.
  • the data to be consecutively transmitted is data 20a and 20b.
  • a delivery confirmation transmitted by the base station 1 is omitted.
  • the MAC scheduler 16 refers to the QoS setting table 17, updates the process correspondence table 18 and the process state table 19, and transmits data 21a in the data transmitting method #1. It is assumed that a process #5 is allocated to the logical channel #1. Note that the tables shown in FIG. 5, FIG. 6 , and FIG. 7 show a storage state at this point in time.
  • the mobile station 2 When an error occurs in the data 21a and the mobile station 2 receives a NACK response, the mobile station 2 refers to the process state table 19. Because the data transmitting method #1 is applied to the process #5, the mobile station 2 retransmits the data 21a as data 21b in the data transmitting method #1. When receiving an ACK response to the data 21b, the mobile station 2 deletes information concerning the process #5 from the process correspondence table 18 and the process state table 19 and changes the process #5 to a free state. Further, when another new data is generated in the logical channel #0 while the data of the logical channel #0 is consecutively transmitted in the process #1, the MAC scheduler 16 refers to the QoS setting table 17 and the process correspondence table 18. Because the data transmitting method #3 is applied in the process #1 in the logical channel #0, the MAC scheduler 16 consecutively transmits new data, sequence numbers of which are changed, as data 22a and 22b instead of the data being consecutively transmitted.
  • the base station 1 performs health check of the mobile station 2 according to the received data.
  • the health check can be performed on all the received data.
  • the data transmitting method #3 is applied, if the health check is performed using only data of the data transmitting method #3, it is possible to reduce a load on health check processing of the base station 1 without excessively performing the health check.
  • a table similar to the QoS setting table 17 is created during connection or during addition of communication in the base station 1, it is possible to discriminate referring to a logical channel given to the received data that the received data is data of the data transmitting method #3.
  • a maximum number of usable processes is set to "1".
  • the data transmitting method #1 and the data transmitting method #2 which are the data transmitting methods shown in FIG. 1 and FIG. 2
  • the data transmission is stopped. Therefore, a non-communication section occurs between the base station 1 and the mobile station 2 when new data is not continuously generated.
  • the base station 1 performs health check of the mobile station 2 in such a non-communication section. Therefore, transmission of a health check packet, which is control data for health check, is necessary.
  • FIG. 8 is a diagram showing an operation in performing health check in a non-communication section when the data transmitting method #1 or the data transmitting method #2 is applied.
  • the health check is performed as shown in FIG. 8 .
  • FIG. 8 is a diagram showing the operation of the health check performed when the data transmitting method #3, which is the data transmitting method in this embodiment shown in FIG. 3 , is not applied. Note that, in FIG. 8 , for simplification, a delivery confirmation for data reception is omitted.
  • data 30a to 30e are data to be transmitted from the mobile station 2 to the base station 1.
  • the mobile station 2 transmits a health check packet 40a after a health check cycle determined in advance. Thereafter, the mobile station 2 transmits a health check packet 40b after the health check cycle. The mobile station 2 continues the transmission of the health check packets until transmission of the data 30d occurs.
  • the data transmitting method #1 or the data transmitting method #2 which is a transmitting method same as a transmitting method for the data 30a to 30e, is applied to the transmission of the health packets.
  • FIG. 8 not only the health check packets but also all received data are used for the health check.
  • the health check can be performed independently from the data transmission.
  • FIG. 9 is a diagram showing an operation in performing the health check independently from the data transmission.
  • the base station 1 uses only the health check packets 41a to 41e without using the data 31a to 31d.
  • the health check explained with reference to FIG. 8 and FIG. 9 is stopped and a health check effect obtained by the data transmitting method #3 is used. That is, switching of a health check method is performed according to a data transmitting method.
  • the health check performed when the data transmitting method #3 is applied is as explained with reference to FIG. 3 or FIG. 4 .
  • the QoS setting table 17 shown in FIG. 5 is created by both of the base station 1 and the mobile station 2 during connection or during addition of communication. Therefore, it is possible to determine not only on a transmission side but also on a reception side whether the data transmitting method #3 is used. Therefore, as explained with reference to FIG. 3 , because the health check is performed using high-quality data transmission, it is possible to perform highly reliable maintenance management of a communication connection state.
  • the data transmitting method in this embodiment is suitable for data transmission in which a low rate and a real time property are required.
  • the data transmitting method explained with reference to FIG. 3 it is possible to perform data transmission higher in quality than the data transmitting method shown in FIG. 2 .
  • the data transmitting method is particularly suitable for road-to-vehicle communication and vehicle-to-vehicle communication, which are mobile communication applied to a train or automobile traffic system in which high reliability is required.
  • a radio apparatus mounted on a train or an automobile is equivalent to the mobile station 2.
  • Data of a vehicle state of position information or speed information including information for the base station 1 to detect the position of the mobile station 2 is transmitted to the base station 1 disposed on a road side.
  • the data transmitting method explained with reference to FIG. 3 is applied to the data transmission in this radio section, it is possible not only to improve data transmission quality of the vehicle state but also to allow the base station 1 to perform health check of the vehicle.
  • the present invention can be also be applied to data communication of not only the control information explained above but also train operation information, automobile navigation information, or expressway billing information.
  • FIG. 10 is a diagram showing an example of the configuration of the base station in the mobile communication system of the present invention.
  • a communication-connection control unit 101 performs, between the host apparatus connected to the base station 1 and the mobile station 2, control for connecting, disconnecting, adding, or deleting communication with the mobile station 2.
  • a wired-data transmitting/receiving unit 102 performs transmission and reception of control information and data to and from the host apparatus via a network.
  • a radio-resource managing unit 103 manages radio resources allocated to mobile stations such as time-division time slots and determines a radio resource for a MAC scheduler 104 to transmit and receive data in a radio section.
  • the MAC scheduler 104 manages a HARQ process for performing radio transmission, allocates the HARQ process to transmission data, and performs transmission and reception of data using the radio resource obtained from the radio-resource managing unit 103.
  • the MAC scheduler 104 performs MAC protocol processing for communicating with the mobile station or format conversion into radio data. Radio resource information for transmitting data from the mobile station is notified to the mobile station 2 via the MAC scheduler 104.
  • the MAC scheduler 104 is equivalent to the MAC scheduler 16 shown in FIG. 4 .
  • a health-check control unit 105 performs execution and switching of health check corresponding to a data transmitting method and notifies the communication-connection control unit 101 of a communication connection maintenance state of the mobile station 2.
  • An internal-table managing unit 106 manages the tables shown in FIG. 5, FIG. 6 , and FIG. 7 on a memory and enables other functional units, for example, the MAC scheduler 104 to access the tables.
  • a baseband-signal processing unit 107 performs modulation/demodulation processing of a radio signal.
  • a radio transmission/reception unit 108 performs transmission and reception of the radio signal. Note that the radio transmission/reception unit 108 includes an antenna as shown in FIG. 10 .
  • FIG. 11 is a diagram showing an example of the configuration of the mobile station in the mobile communication system of the present invention.
  • a communication-connection control unit 201 performs, between an application apparatus, which is an external apparatus connected to the mobile station 2, and the base station 1, control for connecting, disconnecting, adding, or deleting communication.
  • a wired-data transmitting/receiving unit 202 performs transmission and reception of control information and data to and from the external apparatus connected to the mobile station 2.
  • a cell search unit 203 performs reception control of notification information transmitted by the base station 1 and determines a base station that can be present in the zone. Note that the base station that can be present in the zone includes a base station that is a handover candidate.
  • a MAC scheduler 204 requests the base station 1 to allocate radio resources for the mobile station 2 to transmit data and performs transmission and reception of the data using the radio resources obtained from the base station 1.
  • the MAC scheduler 204 manages a HARQ process for transmitting the radio resources by radio, allocates the HARQ process to transmission data, and performs MAC protocol processing for communicating with the base station or format conversion into radio data.
  • a health-check control unit 205 performs execution and switching of health check corresponding to a data transmitting method and notifies the communication-connection control unit 201 of a communication connection maintenance state.
  • An internal-table managing unit 206 manages the tables shown in FIG. 5, FIG. 6 , and FIG.
  • a baseband-signal processing unit 207 performs modulation/demodulation processing of a radio signal.
  • a radio transmission/reception unit 208 performs transmission and reception of the radio signal. Note that the radio transmission/reception unit 208 includes an antenna as shown in FIG. 11 .
  • an aspect of the present invention is a data receiving apparatus that receives data transmitted from a data transmitting apparatus by a data transmitting method applied with HARQ.
  • the data receiving apparatus receives data transmitted by the data transmitting apparatus allocating a process, which is a transmission unit of the same data, to new transmission data, cyclically continuing to transmit the same data being transmitted or an error correction code of the same data in a process same as the process until generation of another new transmission data, and allocating, when another new transmission data is generated, the process of the cyclically continued transmission to the other new transmission data and cyclically transmitting the other new transmission data, performs data combination by the HARQ using the received data to normally receive data and detect a data error or data non-reception, and monitors a communication connection state with the data transmitting apparatus using the received data.
  • a process which is a transmission unit of the same data
  • Another aspect of the present invention is a data transmitting apparatus that transmits data to a data receiving apparatus with a data transmitting method applied with HARQ.
  • the data transmitting apparatus allocates a process, which is a transmission unit of the same data, to new transmission data and transmits the new transmission data, cyclically continues to transmit the same data being transmitted or an error correction code of the same data in a process same as the process until generation of another new transmission data, allocates, when another new transmission data is generated, the process of the cyclically continued transmission to the new transmission data, and cyclically transmits the new transmission data.
  • the transmitted data is normally received by the data receiving apparatus through data combination by the HARQ, a data error or data non-reception is detected, and a communication connection state is monitored by the data receiving apparatus.
  • the data receiving apparatus and the data transmitting apparatus can be adopted as a base station or a mobile station in a mobile communication system.
  • an aspect of the present invention is a data transmitting/receiving apparatus that performs transmission and reception of data with a logical channel applied with a plurality of logical channels.
  • the data transmitting method shown in FIG. 3 which is the data transmitting method explained above, is applied to any one of the plurality of logical channels
  • the data transmitting/receiving apparatus performs the health check using transmission and reception data in the logical channel.
  • the data transmitting method shown in FIG. 3 which is the data transmitting method explained above, is applied to none of the plurality of logical channels
  • the data transmitting/receiving apparatus performs the health check using a packet for the health check.
  • a mobile communication system in which the data transmitting/receiving apparatus is adopted as a mobile station or a base station is also included in the present invention.
  • the data transmitting method according to the present invention is useful for a communication system in which a mobile station is controlled by a base station and is particularly suitable for road-to-vehicle communication and vehicle-to-vehicle communication.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
EP14888405.9A 2014-04-04 2014-11-28 Data transport method and data transmission apparatus Not-in-force EP3125642B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014077922 2014-04-04
PCT/JP2014/081615 WO2015151335A1 (ja) 2014-04-04 2014-11-28 データ伝送方法、データ受信装置、データ送信装置、基地局、移動局、データ送受信装置及び移動通信システム

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EP3125642A1 EP3125642A1 (en) 2017-02-01
EP3125642A4 EP3125642A4 (en) 2017-08-02
EP3125642B1 true EP3125642B1 (en) 2019-11-06

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EP (1) EP3125642B1 (ja)
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GB201410025D0 (en) 2014-06-05 2014-07-16 Ocado Ltd Systems and methods for communication
JP2023145263A (ja) * 2022-03-28 2023-10-11 キヤノン株式会社 通信装置、通信方法、およびプログラム

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EP1465369A1 (en) * 2003-03-31 2004-10-06 Matsushita Electric Industrial Co., Ltd. Reset synchronisation method for a retransmission protocol
US8693407B2 (en) 2006-09-11 2014-04-08 Qualcomm Incorporated Method and apparatus for keep-alive bits transmission
PL2137865T3 (pl) * 2007-03-19 2016-05-31 Ericsson Telefon Ab L M (H)ARQ dla harmonogramowania semi-stałego
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EP3125642A4 (en) 2017-08-02
JP5955483B2 (ja) 2016-07-20
WO2015151335A1 (ja) 2015-10-08
US20170126366A1 (en) 2017-05-04
EP3125642A1 (en) 2017-02-01
US9787439B2 (en) 2017-10-10
JPWO2015151335A1 (ja) 2017-04-13

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